| 单词 | annihilation |
| 释义 | Word Frequency annihilation(əˌnaɪəˈleɪʃən) noun 1. total destruction 2. the act of annihilating 3. physics the destruction of a particle and its antiparticle when they collide. The annihilation of an electron with a positron generates two or, very rarely, three photons of annihilation radiation. The annihilation of a nucleon with its antiparticle generates several pions |
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